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Is there a method to determine whether a host (on your LAN) is on WiFi vs Ethernet using nmap or any other tool? I am OK with fuzzy guesses as well.
tl;dr No, there is none
Long answer:
There is no way to find out what kind of connection other PC on your network is using(without physically accessing it ofc).
Those things are abstracted on network. You can sniff traffic on transport layer by Wireshark and see there is no data on interfaces being transported.
An option:
You can learn a physical network interface vendor by sniffing traffic.
Wireshark can guess those, because vendors have their own MAC address prefixes. And if it's some company which is making wireless interfaces only, you can hit a jackpot. It's not even close to being a bulletproof method though.
Nmap may be used to look for open ports. There might be a chance that you can deduce which software server is running by getting info on ports, but I can hardly imagine you will find anything wlan/eth specific.
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I purchased this device for a hobby project
http://www.grayhill.com/touch-encoder/
It outputs as CANBus (via DB9 connector). I'm not very savvy with these types of serials, but I just want to be able to just sniff/monitor the data packets from this device into my PC.
I bought myself a PCI Serial COM (RS232), and hooked it all up, and downloaded multiple monitoring software, however no data appears to be coming from the Bus.
Again, I'm not too savvy with this, so I don't know if I have configuration correct? Such as Baud rate, Data bits, Parity, etc.
The software I'm using is 'Device Monitoring Studio 8.30' (trial version). The software can see my PCI Card with the Ports; Monitoring does not return anything.
Am I missing something here? My understanding is that CANBus works with RS232.
Thanks
CAN bus and RS232 don't understand each other at the physical level, they use different voltages. And they are not compatible at the higher network layers either.
You need to get yourself a CAN to RS232 converter.
There are some options but all I know of are expensive +100$ US.
I would rather go for one of these which you can plug directly on a USB port on your computer.
Note that I'm not affiliated with the developers and I have not tested this product myself. You should do your own research to make sure you're buying the product that fits your needs best.
You seem to be on Windows so you might want to check cangaroo.
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I am working on a small embedded device based upon an STM32F4xx MCU. It implements a TCP/IP server over a Wi-Fi connection. The question I have relates to exposing the IP address of the device so that it may be discovered by computers on the same network. UPnP and SSDP seem to be rather "heavy" solutions to this problem.
Are there other techniques/protocols that have a smaller footprint than UPnP and SSDP?
Thanks in advance for your input,
Sid
If you can make up any custom protocol, a simple UDP beacon periodically sent to the broadcast address (255.255.255.255 or your preferred interface's broadcast address) is simple and reliable.
Synopsis of comments:
For listing in mainstream platforms' (Windows, Linux, OS X) network views, the best option would likely be to implement the full stack required for Windows' Network Discovery.
If hostname lookup is enough, Netbios or mDNS could be enough.
The search term you are likely looking for is zero-configuration networking and should give you all the available options
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I have mounted two ethernet adapter on my pc and each of them has connected to a seperate network. The problem is that only one of them is active at a same time. In other verb I can ping only through one of them at the same time and if l want to ping another network l should disable the first adapter. So now l want to know how can I use both of them same time.
Avoid assigning multiple adapters in the same computer to the same subnet.When configuring multiple NICs, each NIC should communicate with a different subnet. Configuring two or more NICs on the same subnet may cause communication problems. Delve deeper in this article. There're also example scenarios using two adapters
Also you just can assign 192.168.0.16 to the first adapter, and 192.168.1.16 to another
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on my current router cisco 2811 i have two subnets /30(fe0) and /27(fe1) ...i want to add /25 but i am told i need an external card: Cisco 2-Port Fast Ethernet Layer 3 HWIC. since thats very expensive i have another cisco 2811 i can use. i am thinking about buying 2 serial cards which i could connect these two routers and place my /25 subnet on one of the free FE ports of the second router. these subnets are public IPs so i cant just move things around that easy since i have dedicated IPs to clients.
questions
1)will this work ? connecting two routers of the same kind
2)are there any performance issues?
running a small hosting company
thank you
I think that the best option is buy a cheap switch that support trunks like Cisco sf300 or C2950, make 3 vlans and create 3 subinterface in C28XX one for each subnet.
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I am having three virtual machines with different linux distros installed on it(oracle virtualbox).I just wanted to know if there is any way to connect these three machins in LAN.if so how to do it in vmware and virtualbox?
In Vmware you have the option to create another network for your viritual machine (seperate from your local network). This is called Network Address Translation, in short NAT. What it does in simple terms is that it directs traffic from the internet to the correct pc in the local network. Your computer then becomes the router for your viritual machines. It also can act as a DCHP server that gives out IP addresses to your VMs only.
Here is an example:
As you can see here your viritual machines (VM) get internet access from your computer. Your computer acts similary to your normal router. Keep in mind if you want to connect from one of the computers on the local network, you have to do some port forwarding on your computer.
To do this look under network adapter settings in Vmware.
Hope this helped
-Kad